Value Collection 141193PR Set Screw 1/2-13 X 1-1/4 in Half Dog Grade 8

Product Description

The VALUE COLLECTION 141193PR is a half dog point set screw designed for mechanical assemblies where a positive locating or locking action is required against a shaft or mating component. Sized at 1/2-13 UNC thread with an overall length of 1-1/4 inches, it is driven by a 1/4-inch hex key and manufactured from Grade 8 alloy steel for high tensile strength under load. Conforming to ASME/ANSI B18.3 and ASTM F912 standards, this set screw suits demanding industrial and mechanical applications. Machinists, millwrights, and maintenance technicians regularly install this fastener type during shaft-to-hub assemblies, set collar installations, and similar mechanical connections.

This set screw is suited for use in mechanical power transmission components such as shaft collars, shaft couplings, pulleys, sprockets, and gear hubs where the half dog point engages a mating hole or recess in the shaft to prevent rotation or axial movement. The half dog point profile provides a positive seat in the shaft recess while minimizing surface damage compared to a full dog or cup point. It is commonly found in light industrial machinery, conveyor systems, and general fabrication environments.

Key Features

• Half dog point engages shaft recesses for secure, repeatable positioning
• Grade 8 alloy steel construction provides high tensile and shear strength
• 1/2-13 UNC thread for wide compatibility with standard tapped holes
• 1/4-inch hex drive accepts standard Allen or hex key tooling
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Overall length measured as fractional inch per standard convention

Compatibility

Designed as a standard UNC set screw for use in any tapped 1/2-13 threaded hole requiring a half dog point fastener conforming to ASME/ANSI B18.3 and ASTM F912 specifications.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 1/4-inch hex key or Allen wrench. Ensure the mating shaft recess or flat is properly aligned with the screw axis before tightening. Deburr tapped holes and clean threads before installation to achieve consistent seating. Apply appropriate thread-locking compound if vibration resistance is required by the application.